A bidirectional swash plate type electric compressor

Abstract

This invention relates to the field of bidirectional swashplate electric compressor technology, and more particularly to a bidirectional swashplate electric compressor, comprising a body, a drive motor mounted outside the body, a motor shaft within the drive motor, steel ball slide shoes slidably mounted within the body, a rotating shaft fixedly connected to one end of the motor shaft, a swashplate integrally formed on the rotating shaft, an oil reservoir for storing lubricating oil installed within the body, a bearing fitted onto the motor shaft within the oil reservoir, and a circulation mechanism within the body for driving the circulation of lubricating oil in the oil reservoir. This invention causes a first piston to reciprocate left and right, drawing cryogenic refrigerant into the first cylinder for compression. During transport, the cryogenic refrigerant passes through a second connecting pipe and an annular pipe. Furthermore, during the compression process, the cryogenic refrigerant cools the drive motor and lubricating oil, preventing them from operating at high temperatures and affecting their service life, while simultaneously improving the utilization rate of the cryogenic refrigerant.

Description

Technical Field

[0001] This invention relates to the field of bidirectional swashplate electric compressor technology, and more particularly to a bidirectional swashplate electric compressor. Background Technology

[0002] A compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It is the heart of a refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it, and then discharges high-temperature, high-pressure refrigerant gas through the discharge pipe, providing power for the refrigeration cycle.

[0003] The bidirectional swashplate electric compressor of this invention uses a motor to drive the shaft and swashplate to rotate at high speed to compress the refrigerant and then discharge the compressed refrigerant. This causes a large amount of heat to be generated at the connection between the shaft and the bearing. At the same time, since the connection between the shaft and the bearing is lubricated by lubricating oil, the lubricating oil is in a high-temperature state. The lubricating oil in a high-temperature state is not only prone to damage to the bearing due to overheating, but also prone to oxidation and deterioration due to high temperature, which affects the lubrication effect. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that the lubricating oil at the bearing of the bidirectional swashplate compressor is at a high temperature, which affects the lubrication effect, and to propose a bidirectional swashplate electric compressor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A bidirectional swashplate electric compressor includes a body, a drive motor mounted outside the body, a motor shaft rotatably connected to the body within the drive motor, a steel ball slide shoe slidably mounted within the body, a rotating shaft fixedly connected to one end of the motor shaft, and a swashplate integrally formed on the rotating shaft to movably abut against the steel ball slide shoe. The body contains an oil storage chamber for storing lubricating oil, a bearing fitted onto the motor shaft within the oil storage chamber, a temporary retention chamber for allowing the lubricating oil to settle outside the oil storage chamber, an annular tube wound around the outside of the temporary retention chamber within the body, a circulation mechanism for driving the lubricating oil to circulate within the oil storage chamber, and a cooling component for cooling the lubricating oil in the temporary retention chamber.

[0007] Preferably, the machine body is equipped with a plurality of first cylinders for compressing refrigerant, and each first cylinder is provided with a first piston connected to a steel ball slipper and a first connecting rod.

[0008] Preferably, the machine body is provided with a first discharge chamber and a second discharge chamber, and the first cylinder is provided with a first discharge outlet and a second discharge outlet respectively connected to the first discharge chamber and the second discharge chamber, and a first connecting pipe is fixedly installed in the first discharge chamber.

[0009] Preferably, the circulation mechanism includes a plurality of second cylinders installed in the machine body, each second cylinder having a second piston connected to a steel ball slipper and a second connecting rod, the temporary holding chamber and the second cylinders being connected to an oil storage chamber, and the temporary holding chamber having an integrally formed guide inclined plate.

[0010] Preferably, the second cylinder is fixedly connected to a first oil supply pipe and a second oil supply pipe that are respectively connected to the oil storage chamber and the temporary storage chamber, and the temporary storage chamber is fixedly installed with a third oil supply pipe that is connected to the oil storage chamber.

[0011] Preferably, the temporary holding room is equipped with a cleaning door, and a first cover and a second cover are respectively installed at the left and right ends of the machine body. The guide tilting plate is composed of multiple tilting plates and multiple horizontal plates.

[0012] Preferably, the cooling component includes a placement chamber formed in the inner wall of the machine body, a delivery pipe connected to the second discharge chamber and the annular pipe is installed in the placement chamber, a second connecting pipe connected to the annular pipe is installed in the machine body, and the second connecting pipe is located outside the machine body and wound around the drive motor at one end.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This invention uses a rotating shaft to drive a swashplate to rotate, causing the first piston to reciprocate left and right in the first cylinder, drawing cryogenic refrigerant into the first cylinder for compression. During the transport process, the cryogenic refrigerant passes through a second connecting pipe and an annular pipe. At the second connecting pipe, the cryogenic refrigerant cools the drive motor, and at the annular pipe, it cools the lubricating oil in the temporary chamber. Thus, during the compression of the cryogenic refrigerant, the cryogenic refrigerant is used to cool the drive motor and lubricating oil, preventing them from being at high temperatures and affecting their service life, while also improving the utilization rate of the cryogenic refrigerant.

[0015] 2. In this invention, when the first piston reciprocates left and right, the second piston reciprocates left and right in the second cylinder through a steel ball slipper, drawing lubricating oil from the oil reservoir into the second cylinder. The lubricating oil is then transported to the oil reservoir through the third oil supply pipe, keeping the lubricating oil in a flowing state. This allows the lubricating oil to carry away heat from the connection between the bearing and the motor shaft while simultaneously circulating and covering all lubricated surfaces at the connection, reducing localized wear. Furthermore, the first and second pistons are driven by the same drive device, reducing the need for installation and maintenance of drive equipment. This improves the synchronicity between the compression of the cryogenic refrigerant and the circulating lubricating oil, ensuring that the circulating lubricating oil promptly carries away heat from the connection between the bearing and the motor shaft. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a bidirectional swashplate electric compressor proposed in this invention;

[0017] Figure 2 This is a schematic cross-section of a bidirectional swashplate electric compressor proposed in this invention. Figure 1 ;

[0018] Figure 3 This is a schematic cross-section of a bidirectional swashplate electric compressor proposed in this invention. Figure 2 ;

[0019] Figure 4 This is a left cross-sectional view of a bidirectional swashplate electric compressor proposed in this invention. Figure 1 ;

[0020] Figure 5 This is a left cross-sectional view of a bidirectional swashplate electric compressor proposed in this invention. Figure 2 ;

[0021] Figure 6 This is a left cross-sectional view of a bidirectional swashplate electric compressor proposed in this invention. Figure 3 ;

[0022] Figure 7 This is a left cross-sectional view of a bidirectional swashplate electric compressor proposed in this invention. Figure 4 ;

[0023] Figure 8 This is a schematic cross-section of the temporary storage chamber of a bidirectional swashplate electric compressor proposed in this invention. Figure 1 .

[0024] In the diagram: 1. Body; 2. Motor shaft; 3. Steel ball slide; 4. Swashplate; 5. First cylinder; 6. First piston; 7. Bearing; 8. Temporary holding chamber; 9. Annular tube; 10. First discharge chamber; 11. Second discharge chamber; 12. First discharge outlet; 13. Second discharge outlet; 14. First connecting rod; 15. First connecting pipe; 16. Placement chamber; 17. Delivery pipe; 18. Second connecting pipe; 19. Second cylinder; 20. Second piston; 21. Oil storage chamber; 22. First oil delivery pipe; 23. Second oil delivery pipe; 24. Guide tilt plate; 25. Cleaning door; 26. First cover; 27. Second cover; 28. Third oil delivery pipe; 29. ​​Second connecting rod; 30. Drive motor; 31. Rotating shaft. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0026] Reference Figures 1-8A bidirectional swashplate electric compressor includes a body 1, a drive motor 30 externally mounted on the body 1, a motor shaft 2 rotatably connected to the body 1 within the drive motor 30, and a steel ball slide 3 slidably mounted within the body 1, with a steel ball inside the slide 3. A rotating shaft 31 is fixedly connected to one end of the motor shaft 2, and a swashplate 4 integrally formed on the rotating shaft 31 to move against the steel ball. When the drive motor 30 drives the rotating shaft 31 and the swashplate 4 to rotate via the motor shaft 2, the rotating swashplate 4 pushes the steel ball slide 3 to reciprocate left and right through the steel ball. An oil reservoir 21 for storing lubricating oil is installed within the body 1, and a bearing 7 fitted onto the motor shaft 2 is installed in the oil reservoir 21. The motor shaft 2 is rotatably connected to the oil reservoir 21, and the connection between the bearing 7 and the motor shaft 2 is lubricated by the lubricating oil. A temporary chamber 8 is provided outside the oil reservoir 21 for the lubricating oil to settle and remove impurities from the lubricating oil. Substances (such as metal shavings generated from internal wear of the compressor) settle into the temporary chamber 8, while the lubricating oil is cooled in the temporary chamber 8. The machine body 1 is equipped with an annular pipe 9 wrapped around the temporary chamber 8, which is used to transport low-temperature refrigerant to cool the lubricating oil in the temporary chamber 8. The machine body 1 is equipped with a circulation mechanism to drive the lubricating oil in the oil storage chamber 21 to circulate, so that the lubricating oil carries away the heat at the connection between the bearing 7 and the motor shaft 2, and at the same time circulates and covers all the surfaces that need lubrication at the connection between the bearing 7 and the motor shaft 2 to reduce local wear. The circulating lubricating oil can also carry impurities to the temporary chamber 8 to keep the lubrication system clean. The machine body 1 is equipped with a cooling component to cool the lubricating oil in the temporary chamber 8 to prevent the bearing 7 from overheating and being damaged due to the lubricating oil being at a high temperature, and to prevent the lubricating oil from oxidizing and deteriorating due to high temperature, which would affect the lubrication effect.

[0027] Preferably, the machine body 1 is equipped with a plurality of first cylinders 5 for compressing refrigerant. The first cylinder 5 is provided with a first piston 6 connected to the steel ball slipper 3 and the first connecting rod 14. The machine body 1 is provided with a first discharge chamber 10 and a second discharge chamber 11. The first cylinder 5 is provided with a first outlet 12 and a second outlet 13 respectively connected to the first discharge chamber 10 and the second discharge chamber 11. The first outlet 12 and the second outlet 13 are both provided with one-way valves, so that the refrigerant enters the second outlet 13 and the first cylinder 5 sequentially only from the second discharge chamber 11, and the refrigerant enters the first outlet 12 and the first discharge chamber 10 sequentially only from the first cylinder 5. The first discharge chamber 10 is fixedly installed with a first connecting pipe 15.

[0028] Preferably, the cooling assembly includes a placement chamber 16 formed in the inner wall of the body 1. A delivery pipe 17 connected to the second discharge chamber 11 and the annular pipe 9 is installed in the placement chamber 16. A one-way valve is provided on the delivery pipe 17 at the second discharge chamber 11, so that the refrigerant enters the second discharge chamber 11 only from the delivery pipe 17. A second connecting pipe 18 connected to the annular pipe 9 is installed in the body 1. A compressor controller is installed at the front end of the drive motor 30. The second connecting pipe 18 is wrapped around the drive motor 30 and the compressor controller at one end outside the body 1. The second connecting pipe 18 is used to deliver low-temperature refrigerant to cool the drive motor 30 and the compressor controller and reduce their operating temperature, thereby ensuring the working stability of the two components and improving their reliability.

[0029] While the steel ball slide 3 reciprocates left and right, the steel ball slide 3 drives the first piston 6 to reciprocate left and right in the first cylinder 5 via the first connecting rod 14, as shown in the attached diagram. Figure 3 As shown, when the first piston 6 moves to the left in the first cylinder 5, it delivers the low-temperature refrigerant from the second connecting pipe 18, the annular pipe 9, the conveying pipe 17 and the second discharge chamber 11 to the first cylinder 5. When the first piston 6 moves to the right in the first cylinder 5, it compresses the low-temperature refrigerant. The compressed high-temperature refrigerant is discharged from the machine body 1 from the first discharge port 12, the first discharge chamber 10 and the first connecting pipe 15. The above operation is then repeated to circulate and compress the refrigerant.

[0030] It should be noted that the first connecting pipe 15 and the second connecting pipe 18 can be connected to equipment such as condensers. The first connecting pipe 15 delivers high-temperature refrigerant to equipment such as condensers, and at the same time, the high-temperature refrigerant is restored to low-temperature refrigerant by the condenser and other equipment, and then the low-temperature refrigerant is delivered to the second connecting pipe 18, so that the refrigerant can be recycled.

[0031] Preferably, the circulation mechanism includes multiple second cylinders 19 installed in the body 1, and the motor shaft 2 is located in the second cylinder 19 and fixedly connected to the rotating shaft 31 via a flange coupling. A second piston 20 connected to the ball bearing 3 and the second connecting rod 29 is provided in the second cylinder 19. The temporary storage chamber 8 and the second cylinder 19 are connected to the oil storage chamber 21. A guide inclined plate 24 is integrally formed in the temporary storage chamber 8. The second cylinder 19 is fixedly connected to the oil storage chamber 21 and the temporary storage chamber 8 respectively. The first oil supply pipe 22 and the second oil supply pipe 23 are connected. The temporary storage chamber 8 is fixedly installed with a third oil supply pipe 28 that is connected to the oil storage chamber 21. The first oil supply pipe 22, the second oil supply pipe 23 and the third oil supply pipe 28 are all equipped with one-way valves, so that the lubricating oil flows only from the oil storage chamber 21 and the first oil supply pipe 22 into the second cylinder 19, the lubricating oil flows only from the second cylinder 19 and the second oil supply pipe 23 into the temporary storage chamber 8, and the lubricating oil flows only from the temporary storage chamber 8 and the third oil supply pipe 28 into the oil storage chamber 21.

[0032] It should be noted that when the steel ball slide shoe 3 reciprocates left and right, the steel ball slide shoe 3 drives the second piston 20 to reciprocate left and right in the second cylinder 19 through the second connecting rod 29. When the second piston 20 moves to the right in the second cylinder 19, the lubricating oil in the oil storage chamber 21 flows from the first oil supply pipe 22 to the second cylinder 19. When the second piston 20 moves to the left in the second cylinder 19, the lubricating oil flows from the second oil supply pipe 23 to the temporary storage chamber 8. The lubricating oil is temporarily retained and settled in the temporary storage chamber 8. When the water level of the lubricating oil is higher than the opening of the third oil supply pipe 28, the lubricating oil flows from the third oil supply pipe 28 to the oil storage chamber 21 to allow the lubricating oil to circulate.

[0033] Furthermore, during the compression of the cryogenic refrigerant, the cryogenic refrigerant is used to cool the drive motor 30 and the lubricating oil located in the temporary chamber 8, so as to avoid the drive motor 30 and the lubricating oil being in a high-temperature state and affecting their service life, while improving the utilization rate of the cryogenic refrigerant.

[0034] Meanwhile, the first piston 6 and the second piston 20 are driven by the same drive device to reduce the drive device that needs to be installed and maintained, thereby improving the simultaneity between the movement of the compressed cryogenic refrigerant and the circulating lubricating oil, so that the circulating lubricating oil can carry away the heat at the connection between the bearing 7 and the motor shaft 2 in a timely manner.

[0035] Preferably, the temporary holding chamber 8 is equipped with a cleaning door 25, and the left and right ends of the machine body 1 are respectively bolted with a first cover 26 and a second cover 27. The guide tilting plate 24 is composed of multiple tilting plates and multiple horizontal plates, as shown in the attached figure. Figure 8As shown, when the lubricating oil flows from the second oil pipe 23 to the temporary chamber 8, the lubricating oil falls to the horizontal plate at the lowest point of the guide inclined plate 24. Then, the lubricating oil flowing into the temporary chamber 8 gradually accumulates, causing the water level of the lubricating oil to gradually rise. Under the action of gravity, the impurities in the lubricating oil gradually settle to the lowest horizontal plate. The impurities are blocked by the adjacent inclined plate to prevent them from moving to the third oil pipe 28. When it is necessary to clean the impurities in the temporary chamber 8, the first cover 26 is removed and the cleaning door 25 is opened to clean the impurities in the temporary chamber 8.

[0036] The functional principle of this invention can be explained through the following operational methods:

[0037] First, start the drive motor 30, which drives the motor shaft 2 and the rotating shaft 31 to rotate together. At the same time, the low-temperature refrigerant is input from the second connecting pipe 18. The low-temperature refrigerant is transported to the first cylinder 5 through the annular pipe 9, the delivery pipe 17 and the second discharge chamber 11. Meanwhile, the rotating shaft 31 drives the swashplate 4 to rotate. The rotating swashplate 4 drives the steel ball slide shoe 3 to reciprocate left and right. The steel ball slide shoe 3 drives the first piston 6 to reciprocate left and right in the first cylinder 5 through the first connecting rod 14, so as to compress the low-temperature refrigerant in the first cylinder 5 into a high-temperature refrigerant. The high-temperature refrigerant is discharged from the machine body 1 through the first discharge chamber 10 and the first connecting pipe 15. Then, the low-temperature refrigerant is drawn into the first cylinder 5 for compression.

[0038] Meanwhile, the steel ball slipper 3 drives the second piston 20 to reciprocate left and right in the second cylinder 19 via the second connecting rod 29, so as to draw the lubricating oil in the oil storage chamber 21 into the second cylinder 19 and then discharge the lubricating oil into the temporary chamber 8. During the transportation process, the low-temperature refrigerant passes through the second connecting pipe 18 and the annular pipe 9. The low-temperature refrigerant cools the drive motor 30 at the end of the second connecting pipe 18 located outside the machine body 1, and cools the lubricating oil in the temporary chamber 8 at the annular pipe 9. At the same time, the lubricating oil is temporarily retained and settled in the temporary chamber 8. After that, the lubricating oil is transported to the oil storage chamber 21 from the third oil supply pipe 28, so that the lubricating oil is in a flowing state. This allows the lubricating oil to carry away the heat at the connection between the bearing 7 and the motor shaft 2, and at the same time, the lubricating oil circulates and covers all the surfaces that need lubrication at the connection between the bearing 7 and the motor shaft 2, so as to reduce local wear.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bidirectional swash plate electric compressor comprising a body (1), characterized in that, A drive motor (30) is provided outside the body (1). A motor shaft (2) is provided in the drive motor (30) and rotatably connected to the body (1). A steel ball slipper (3) is slidably provided in the body (1). A rotating shaft (31) is fixedly connected to one end of the motor shaft (2) at the body (1). An inclined plate (4) is integrally formed on the rotating shaft (31) and moves against the steel ball slipper (3). An oil storage chamber (21) for storing lubricating oil is installed in the body (1). A bearing (7) fitted onto the motor shaft (2) is installed in the oil storage chamber (21). A temporary chamber (8) for allowing the lubricating oil to settle is provided outside the oil storage chamber (21). 1) An annular tube (9) is provided in the body (1) and a circulation mechanism is provided in the body (1) for driving the lubricating oil in the oil storage chamber (21) to circulate. A cooling component is provided in the body (1) for cooling the lubricating oil in the temporary chamber (8). The cooling component includes a placement chamber (16) opened on the inner wall of the body (1). A conveying pipe (17) connected to the second discharge chamber (11) and the annular tube (9) is installed in the placement chamber (16). A second connecting pipe (18) connected to the annular tube (9) is installed in the body (1), and the second connecting pipe (18) is located outside the body (1) and is wound around the drive motor (30).

2. A reversible swash plate type electric compressor according to claim 1, characterized by The machine body (1) is equipped with a plurality of first cylinders (5) for compressing refrigerant, and the first cylinder (5) is provided with a first piston (6) connected to the steel ball slipper (3) and the first connecting rod (14).

3. A reversible swash plate type electric compressor according to claim 2, characterized by The body (1) is provided with a first discharge chamber (10) and a second discharge chamber (11). The first cylinder (5) is provided with a first discharge outlet (12) and a second discharge outlet (13) that are respectively connected to the first discharge chamber (10) and the second discharge chamber (11). The first discharge chamber (10) is fixedly installed with a first connecting pipe (15).

4. A bidirectional swashplate electric compressor according to claim 1, characterized in that, The circulation mechanism includes a plurality of second cylinders (19) installed in the body (1). The second cylinders (19) are provided with a second piston (20) connected to the steel ball slipper (3) and the second connecting rod (29). The temporary chamber (8) and the second cylinders (19) are connected to the oil storage chamber (21). The temporary chamber (8) is integrally formed with a guide tilt plate (24).

5. A bidirectional swashplate electric compressor according to claim 4, characterized in that, The second cylinder (19) is fixedly connected to a first oil supply pipe (22) and a second oil supply pipe (23) that are respectively connected to the oil storage chamber (21) and the temporary storage chamber (8). The temporary storage chamber (8) is fixedly installed with a third oil supply pipe (28) that is connected to the oil storage chamber (21).

6. A bidirectional swashplate electric compressor according to claim 5, characterized in that, The temporary holding room (8) is equipped with a cleaning door (25), and the left and right ends of the body (1) are respectively equipped with a first cover (26) and a second cover (27). The guide tilt plate (24) is composed of multiple tilt plates and multiple horizontal plates.

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